Friday

November 28, 2014

November 28, 2014

Posted by **Lucy** on Saturday, August 23, 2008 at 2:39pm.

1) Find the height of the building to the nearest foot

2) find the length of the shadow to the nearest foot

If 0 degrees </= 360 degrees, solve the equation, sec x= -2. I do not know how to solve this and cannot find an example in my book.

Thanks for all your help!

- Pre-calculus -
**Reiny**, Saturday, August 23, 2008 at 2:47pm<If 0 degrees </= 360 degrees, solve the equation, sec x= -2. I do not know how to solve this and cannot find an example in my book. >

if sec x = -2, then cosx = -1/2

You should know that cos 60 = +1/2

so the angle x must be in quadrants II or III

so the angle x = 180-60 or 120 degrees or

x = 180+60 = 240 degrees

**Answer this Question**

**Related Questions**

Pre-Calculus - 1.The angle of elevation to top of a building from a point on the...

pre cal - At a distance of 100 feet, the angle of elevation from the horizontal...

Pre-Calculus - A surveyor measures the distance between buildings X and Y as ...

math - a building casts a 25 foot shadow on a sunny day. If the angle of ...

pre calc - from a distance of 50 feet from the base building, the angle of ...

Trig - From a point 120 feet from the base of a plant building the angle of ...

Pre calculus - From h a point A that is 10 meters abov level ground, the angle ...

Precalculus - To estimate the height of a building, two students find the angle ...

math - A flagpole and a building stands on the same horizontal level.From the ...

precal - A contractor needs to know the height of a building to estimate the ...